relativity

The quality or state of being relative.

A state of dependence in which the existence or significance of one entity is solely dependent on that of another.

Special relativity.

General relativity.

The character of being relative; relativeness; the being of an object as it is by force of something to which it is relative.

Specifically Phenomenality; existence as an immediate object of the understanding or of experience; existence only in relation to a thinking mind.

The doctrine that it is impossible to have knowledge of anything except by means of its relations to the mind, direct and indirect, cognized as relations.

The doctrine of phenomenalism, that only appearances can be known, and that the relations of these appearances to external substrata, if such there be, are completely incognizable. This doctrine is sometimes associated with a denial of the possibility of any knowledge of relations as such, or at least of any whose terms are not independently present together in consciousness. It would therefore better be denominated the doctrine of the impossibility of relativity of cognition.

The doctrine that we can only become conscious of objects in their relations to one another. This doctrine is almost universally held by psychologists.